Can You Manually Bypass an ECM-Controlled Relay? (Automotive Electrical WARNING!) скачать в хорошем качестве

Can You Manually Bypass an ECM-Controlled Relay? (Automotive Electrical WARNING!)

🚨 LEVEL UP YOUR SKILLS: Access Ad Free repair videos and advanced troubleshooting only on Patreon:   / maddoxmechanic   https://linktr.ee/maddox_mechanic A viewer asked a great question about ECM-controlled relays: If the Engine Control Module (ECM) is grounding the relay coil to turn a circuit on, can you add your own manual ground switch to bypass the computer and control the relay yourself? The short answer is yes, you can add your own ground switch [00:43]. The longer, more critical answer is that you must be aware of the potential feedback issues this creates within the complex automotive electrical system! ⚠️ WARNING: Consider the Feedback! The issue with manually overriding an ECM-controlled, ground-side switched relay is that the computer expects to have full control of the circuit's operation [00:06]. Relay Operation: The ECM connects the relay coil to ground, taking 12V from the battery to energize the coil, which swings the internal switch to Terminal 87 and powers other components [00:13, 00:26]. The Hidden Components: The ECU often receives secondary power from this same relay, and other components in the circuit send feedback and information back to the computer [00:54, 01:07]. The Risk: If you manually energize the relay, components will send information and power back to the ECU that it is not expecting, causing the engine computer to "really freak out" [01:07, 01:13]. When manually bypassing a computer-controlled relay, it is crucial to consider all the variables involved and the feedback the engine computer is expecting from the circuit [01:13, 01:21]. Connect with the Garage: Channel: Adventures In Your Own Garage (Be sure to check out the channel for more electrical diagrams and automotive tips!) 🏷️️ SEO Tags (Suggestions for your tag field): ECM Controlled Relay Manual Relay Bypass Ground Side Switch Automotive Electrical Engine Computer Feedback Relay Wiring Diagram Automotive Diagnostics ECM Troubleshooting 12 Volt Relay Car Relay Bypass Adventures In Your Own Garage YouTube Shorts